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BR8104928A - LENS SET TO FOCUS ON AN OPTICAL BEAM ON A VIDEO INFORMATION DISC ON A VIDEO RECORDING / REPRODUCTION MACHINE - Google Patents

LENS SET TO FOCUS ON AN OPTICAL BEAM ON A VIDEO INFORMATION DISC ON A VIDEO RECORDING / REPRODUCTION MACHINE

Info

Publication number
BR8104928A
BR8104928A BR8104928A BR8104928A BR8104928A BR 8104928 A BR8104928 A BR 8104928A BR 8104928 A BR8104928 A BR 8104928A BR 8104928 A BR8104928 A BR 8104928A BR 8104928 A BR8104928 A BR 8104928A
Authority
BR
Brazil
Prior art keywords
focus
optical beam
lens set
information disc
reproduction machine
Prior art date
Application number
BR8104928A
Other languages
Portuguese (pt)
Inventor
Richard L Wilkinson
George Vitale
Original Assignee
Discovision Ass
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Discovision Ass filed Critical Discovision Ass
Publication of BR8104928A publication Critical patent/BR8104928A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0908—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for focusing only
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0933—Details of stationary parts
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0927—Electromechanical actuators for lens positioning for focusing only

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
BR8104928A 1980-10-20 1981-07-30 LENS SET TO FOCUS ON AN OPTICAL BEAM ON A VIDEO INFORMATION DISC ON A VIDEO RECORDING / REPRODUCTION MACHINE BR8104928A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/198,697 US4422169A (en) 1980-10-20 1980-10-20 Lens assembly for a video recorder-playback machine

Publications (1)

Publication Number Publication Date
BR8104928A true BR8104928A (en) 1982-08-31

Family

ID=22734421

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8104928A BR8104928A (en) 1980-10-20 1981-07-30 LENS SET TO FOCUS ON AN OPTICAL BEAM ON A VIDEO INFORMATION DISC ON A VIDEO RECORDING / REPRODUCTION MACHINE

Country Status (10)

Country Link
US (1) US4422169A (en)
EP (1) EP0050367A1 (en)
JP (1) JPS5771535A (en)
KR (1) KR850001481B1 (en)
AU (1) AU543367B2 (en)
BR (1) BR8104928A (en)
CA (1) CA1149062A (en)
ES (1) ES8205338A1 (en)
MX (1) MX149708A (en)
NO (1) NO157556C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594702A (en) * 1982-11-12 1986-06-10 Discovision Associates Fluid bearing for axially movable head
US4598989A (en) * 1982-12-23 1986-07-08 Konishiroku Photo Industry Co. Ltd. Camera
JPS6124820U (en) * 1984-07-13 1986-02-14 パイオニア株式会社 lens drive device
US4686156A (en) * 1985-10-11 1987-08-11 Gte Service Corporation Coated cemented carbide cutting tool
JPH03100935A (en) * 1989-09-12 1991-04-25 Hitachi Ltd Dust proofing device for optical pickup
TW239211B (en) * 1993-04-02 1995-01-21 Hyundai Electronics America Electromagnetic lens actuator for optical disk drive
CN1297975C (en) * 2001-04-25 2007-01-31 皇家菲利浦电子有限公司 Optical lens system comprising at least one lens of synthetic material
US6741405B1 (en) * 2003-03-27 2004-05-25 Exquisite Optical Technology Co., Ltd Hood for a digital image collecting lens

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3154627A (en) * 1960-08-09 1964-10-27 Parsons & Co Sir Howard G Control means for controlling static gas pressures in support means for a reflector of an optical telescope
US3081682A (en) * 1961-06-28 1963-03-19 Ibm Method and apparatus for obtaining and maintaining spacing of a transducer
GB1246416A (en) * 1969-04-18 1971-09-15 Central Electr Generat Board Improvements in or relating to television cameras
DE2259604B2 (en) * 1972-12-06 1981-02-05 Robert Bosch Gmbh, 7000 Stuttgart Air bearings for optical systems
NL164689C (en) * 1975-03-10 1981-01-15 Philips Nv OPTICAL FOCUSING DEVICE FOR FOCUSING A RADIUS BUNDLE.
US4006294A (en) * 1975-05-27 1977-02-01 Mca Disco-Vision, Inc. Transducer head assembly with fluid bearing and head height control system
NL7605374A (en) * 1976-05-20 1977-11-22 Philips Nv DEVICE FOR OPTICAL READING AND / OR DESCRIPTION OF A ROTATING PLATE USING A BEAM BEAM.
JPS6032265B2 (en) * 1977-04-19 1985-07-26 ソニー株式会社 Focus control device for optical playback device
SU710069A1 (en) * 1978-07-17 1980-01-15 Предприятие П/Я Р-6380 Device for optical focusing of light beam
US4349244A (en) * 1980-04-23 1982-09-14 Jenoptik Jena Gmbh High quality objective using air bearing

Also Published As

Publication number Publication date
EP0050367A1 (en) 1982-04-28
KR850001481B1 (en) 1985-10-10
AU543367B2 (en) 1985-04-18
NO812080L (en) 1982-04-21
CA1149062A (en) 1983-06-28
NO157556B (en) 1987-12-28
AU7249981A (en) 1982-04-29
US4422169A (en) 1983-12-20
JPS5771535A (en) 1982-05-04
MX149708A (en) 1983-12-13
ES504182A0 (en) 1982-05-16
NO157556C (en) 1988-04-13
ES8205338A1 (en) 1982-05-16

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Legal Events

Date Code Title Description
MK Patent expired

Effective date: 19960730

RH Request refused